If you get:
User receives the following error:
Setup is unable to proceed due to the following error(s):
The 2007 Microsoft Office system does not support upgrading from a prerelease version of the 2007 Microsoft Office system. You must first uninstall any prerelease versions of the 2007 Microsoft Office system products and associated technologies.
Correct the issue(s) listed above and re-run setup.
Then:
The Office 2003 Web Components feature installed with Office 2007 Beta2 causes the Office 2007 product to block its installation. Users should use Add Remove Programs in the Windows Control Panel to Remove the Office 2003 Web Components, and then install the final Office 2007 product.
This info is in the install readme that we all read of course!!!
Previously posted at blog.Solidsoft.com